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Free Online Calculator Hub

Calc – Free Online Calculator Hub

Productivity

Added July 9, 2026 · Last analysed July 9, 2026 · via · 60% unique tagline

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Screenshot of Free Online Calculator Hub

StackScope is a free public catalogue of indie launches. We find launches on Product Hunt, Hacker News and similar feeds, then crawl each site to detect its tech stack and score it for launch readiness: DNS, security headers, SEO basics. This page is what we saw on 9 July 2026; the live site may have changed since.

Free Online Calculator Hub has the basics covered well, with complete legal pages and clean crawl signals. Worth fixing first: missing several security headers and incomplete email security.

Launched on Product Hunt on July 9, 2026. The site is hosted on Hostinger, with a domain registered 12 weeks before launch. Our crawler found 10 technologies on this site, covering servers, wordpress plugin, CMS, and developer tools. The stack includes WordPress, Blocksy, and Google Search Console.

It's also running the same core stack as 1,069 other launches.

If you own this site, refresh the snapshot and see the full fix list any time →

7.0
StackScope Score
Good
78/100 Launch Readiness
Well prepared
1/6 Security Headers
Poor
3/3 Legal
Complete
2/2 Crawl files
Complete
100/100 Performance
Fast
Vibe Score 0 · No AI signals
How much the site looks AI-generated. Informational pattern-match signal, not a verdict. Does not feed the StackScope Score. See which fingerprints fired →

Tech Stack (10)

Infrastructure
Hosting Hostinger
Server LiteSpeed Web Server
PHP
Build & Framework
CMS WordPress (3)
Developer tools Vite
WordPress plugin Rank Math
WP Rocket (2)
WordPress theme Blocksy
Analytics & Marketing
SEO Google Search Console
Business Tools
Push notifications OneSignal (2)

Infrastructure

Network
AS-HOSTINGER - Hostinger International Limited, CY
AS47583 · LT
DNSSEC
Not enabled
DNS responses unsigned. Cache-poisoning vulnerable.
Green hosting
Green hosted
Host runs on renewable energy. Data from The Green Web Foundation.
SSL Certificate
Google Trust Services
Valid 4 Jul 2026 to 2 Oct 2026
Certificate as captured in this snapshot, not a live check.
Domain Age
3 months
Registered Apr 2026 · HOSTINGER operations, UAB

Email Security

✓
SPF ~all (via apex seofyai.com) Soft-fail (~all). Common and accepted.
?
DKIM Not detected at common selectors. Your provider may use a custom one.
✗
DMARC p=none (via apex seofyai.com) None (p=none). Monitoring only.
?
MTA-STS Not deployed. Mail to your domain can be downgraded to plaintext en route.
?
TLS-RPT Not configured. You won't hear about silent SMTP TLS handshake failures.

Storage (0)

This site uses no client-side storage we could detect on page load.

Readiness Breakdown How?

⚠
Custom title and meta description (partial) missing meta description
⚠
Open Graph tags (title, image, description) (partial) missing og:image, og:description
✓ Twitter card meta tags
✓ Canonical URL declared
✓ Responsive viewport meta tag
✓ Favicon present
✓ Semantic HTML (nav, main, article)

Performance How?

492 ms Server response
36% Faster than peers
1528 ms Largest contentful paint
0.00 Cumulative layout shift
271 KB Page weight
203 KB Image weight
2 Third-party domains
0 Console errors
0 Failed requests

⚠ 7 images: 1 oversized

Indicative grade from a single automated render, not a substitute for Lighthouse or field data, and not part of the StackScope score.

AI Stance

No AI stance declared
✗ llms.txt published
✓ No AI bots blocked in robots.txt
Content-Signal
? No directive declared
Link headers
? None advertised

Well-Known Files

✓ robots.txt
✓ sitemap.xml (3 URLs)
✗ security.txt
✗ llms.txt
✗ ads.txt
✗ humans.txt

Legal

✓ Privacy Policy
/privacy-policy/
✓ Terms of Service
/terms-and-conditions/
78% unique
Mentions:
Cookies Do Not Sell

Security Headers (1/6)

✗
Referrer-Policy
✗
X-Frame-Options
✗
Permissions-Policy experimental (check browser support)
✗
X-Content-Type-Options
✓
Content-Security-Policy
✗
Strict-Transport-Security
–
X-XSS-Protection deprecated (use Content-Security-Policy)

Build

2 JS files
8 CSS files
2 Third-party domains

Brand Colours

Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.